print 5 lines from input file - c

Question

currently, I am writing code in c program for printing small portion of contents from the input file. Actually, in my code I can able to print just one single line. but, i have to print next 5 lines after that one line.
I am new to programming, please help to solve this problem**
code is given below
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int lineNumber = 2;
int main()
{
FILE *file;
char line[100];
int count = 0;
///Open LS-dyna file to read
file = fopen("P:\\tut_c\\read\\df-read\\in.txt", "r");
if (file == NULL)
{
perror("fopen");
exit(EXIT_FAILURE);
}
else if ( file != NULL )
{
char line[256];
while (fgets(line, sizeof line, file) != NULL)
{
if (count == lineNumber)
{
printf("\n str %s ", line);
fclose(file);
return 0;
}
else
{
count++;
}
}
fclose(file);
}
return 0;
}

Answer 1

The first logical error occurs in your while loop, first iteration, when you close the file and return 0.
Next, there is no reason to have a counter for your lines, since there are many c functions that can handle finding the end of file (eof).
Instead:
Use a while loop for iteration through the file.
Use a standard library c function for file reading.
Check if file has reached the end.
If the line is still valid, then print the line.
Here is some code to reiterate:
int main()
{
FILE *file;
file = fopen("file.txt", "r");
if (!file){ // check if file exists
perror("fopen");
exit(EXIT_FAILURE);
}
else { // if file exists, then...
char line[256];
while(fgets(line, sizeof line, file)){
printf("\n str %s ", line);
}
fclose(file);
}
return 0;
}// end main